herb · transplant
Lemon Balm: how much to plant.
A family of 4 eating lemon balm a few times a week needs about 22 plants in ~66 sq ft, worth about $132 a year at the store. Here are the exact numbers for your household, and when to plant in every zone.
How much to plant
Plants, space, seeds, and value.
Counts assume about 3 servings per person per week with a germination buffer built in. Store value uses ~$8.00/lb retail — an estimate that varies by region and season.
| Household | Plants | Bed space | Seeds to buy | Store value / yr |
|---|---|---|---|---|
| 1 person | 6 | ~18 sq ft | ~11 | ~$36 |
| 2 people | 11 | ~33 sq ft | ~20 | ~$66 |
| 4 people | 22 | ~66 sq ft | ~40 | ~$132 |
| 6 people | 33 | ~99 sq ft | ~60 | ~$198 |
Spacing
18" in row · 24" between rows
Sow depth
0.125"
Days to harvest
55 from transplant (75 from seed)
When to plant
Sow windows by USDA zone, 2026.
Zone dates are typical, not exact. The free planner uses your ZIP code's frost dates, not just the zone, and shifts every window to match.
| Zone | Spring sow window | Fall sow window |
|---|---|---|
| Zone 3 | May 29 – Jul 24 | — |
| Zone 4 | May 24 – Jul 19 | — |
| Zone 5 | May 14 – Jul 9 | — |
| Zone 6 | May 4 – Jun 29 | — |
| Zone 7 | Apr 19 – Jun 14 | — |
| Zone 8 | Apr 8 – Jun 3 | — |
| Zone 9 | Mar 6 – May 1 | — |
| Zone 10 | Feb 14 – Apr 11 | — |
Know before you grow
The practical stuff.
Yield
About 0.75 lbs per plant over ~18 productive weeks (~0.75 lb).
Watch for
Aphids · Spider mites · Downy & powdery mildew · Japanese beetles — the pest guide covers organic fixes for each, and Pest Radar shows what gardeners near you are reporting right now.
Neighbors
Plays well with tomato-slicing, tomato-cherry, basil, mint.
Stop guessing. Get your exact numbers.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for your ZIP code — not just your zone — in about 60 seconds.